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      <a id="expsegba"></a>
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        <h2>
          <span class="refentrytitle">expsegba</span>
        </h2>
        <p>expsegba — 
      An exponential segment generator operating at a-rate with
      absolute times.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp102090896"></a>
        <h2>Description</h2>
        <p>
      An exponential segment generator operating at a-rate. This unit
      is almost identical to <a class="link" href="expsegb.html" title="expsegb"><em class="citetitle">expsegb</em></a>, but
      more precise when defining segments with very short durations
      (i.e., in a percussive attack phase) at audio rate. 
    </p>
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      <div class="refsect1">
        <a id="idp102093136"></a>
        <h2>Syntax</h2>
        <pre class="synopsis">ares <span class="command"><strong>expsegba</strong></span> ia, itim1, ib [, itim2] [, ic] [...]</pre>
      </div>
      <div class="refsect1">
        <a id="idp102095360"></a>
        <h2>Initialization</h2>
        <p>
      <span class="emphasis"><em>ia</em></span> -- starting value. Zero is illegal.
    </p>
        <p>
      <span class="emphasis"><em>ib</em></span>, <span class="emphasis"><em>ic</em></span>, etc. -- value after <span class="emphasis"><em>itim1</em></span> seconds, etc. must be non-zero and must agree in sign with <span class="emphasis"><em>ia</em></span>.
    </p>
        <p>
      <span class="emphasis"><em>itim1</em></span> -- time in seconds at end of first segment.
    </p>
        <p>
      <span class="emphasis"><em>itim2</em></span>, <span class="emphasis"><em>itim3</em></span>, etc. --
      time in seconds at the end of subsequent segments.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp102101248"></a>
        <h2>Performance</h2>
        <p>
      This unit generate audio signals whose values can pass through
      two or more specified points. The final <span class="emphasis"><em>tim
      </em></span> value may or may not equal the instrument's
      performance time. A shorter performance will truncate the
      specified pattern, while a longer one will cause the last
      defined segment to continue on in the same direction.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp102103232"></a>
        <h2>Examples</h2>
        <p>
      Here is an example of the expsegba opcode. It uses the file <a class="ulink" href="examples/expsegba.csd" target="_top"><em class="citetitle">expsegba.csd</em></a>.

      </p>
        <div class="example">
          <a id="idp102105088"></a>
          <p class="title">
            <strong>Example 241. Example of the expsegba opcode.</strong>
          </p>
          <div class="example-contents">
            <p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
            <pre class="programlisting">
<span class="csdtag">&lt;CsoundSynthesizer&gt;</span>
<span class="csdtag">&lt;CsOptions&gt;</span>
<span class="comment">; Select audio/midi flags here according to platform</span>
<span class="comment">; Audio out   Audio in    No messages</span>
-odac           -iadc     -d     <span class="comment">;;;RT audio I/O</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o expsega.wav -W ;;; for file output any platform</span>
<span class="csdtag">&lt;/CsOptions&gt;</span>
<span class="csdtag">&lt;CsInstruments&gt;</span>

<span class="comment">; Initialize the global variables.</span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">kr</span> <span class="op">=</span> 4410
<span class="ohdr">ksmps</span> <span class="op">=</span> 10
<span class="ohdr">nchnls</span> <span class="op">=</span> 1

<span class="comment">; Instrument #1.</span>
<span class="oblock">instr</span> 1
  <span class="comment">; Define a short percussive amplitude envelope that</span>
  <span class="comment">; goes from 0.01 to 20,000 and back.</span>
  aenv <span class="opc">expsegba</span> 0.01, 0.1, 20000, 0.2, 0.01

  a1 <span class="opc">oscil</span> aenv, 440, 1
  <span class="opc">out</span> a1
<span class="oblock">endin</span>


<span class="csdtag">&lt;/CsInstruments&gt;</span>
<span class="csdtag">&lt;CsScore&gt;</span>

<span class="comment">; Table #1, a sine wave.</span>
<span class="stamnt">f</span> 1 0 16384 10 1

<span class="comment">; Play Instrument #1 for one second.</span>
<span class="stamnt">i</span> 1 0 1
<span class="comment">; Play Instrument #1 for one second.</span>
<span class="stamnt">i</span> 1 1 1
<span class="comment">; Play Instrument #1 for one second.</span>
<span class="stamnt">i</span> 1 2 1
<span class="comment">; Play Instrument #1 for one second.</span>
<span class="stamnt">i</span> 1 3 1
<span class="stamnt">e</span>


<span class="csdtag">&lt;/CsScore&gt;</span>
<span class="csdtag">&lt;/CsoundSynthesizer&gt;</span>
</pre>
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        <p><br class="example-break" />
    </p>
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      <div class="refsect1">
        <a id="idp102109376"></a>
        <h2>See Also</h2>
        <p>
      <a class="link" href="expsegb.html" title="expsegb"><em class="citetitle">expsegb</em></a>, 
      <a class="link" href="expsegr.html" title="expsegr"><em class="citetitle">expsegr</em></a>
    </p>
      </div>
      <div class="refsect1">
        <a id="idp102112384"></a>
        <h2>Credits</h2>
        <p>Author: John ffitch</p>
        <p>June 2011</p>
        <p>New in Csound 5.14</p>
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